1 /* $NetBSD: freebsd_misc.c,v 1.34 2021/09/07 11:43:03 riastradh Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Frank van der Linden 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed for the NetBSD Project 18 * by Frank van der Linden 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* 35 * FreeBSD compatibility module. Try to deal with various FreeBSD system calls. 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: freebsd_misc.c,v 1.34 2021/09/07 11:43:03 riastradh Exp $"); 40 41 #if defined(_KERNEL_OPT) 42 #include "opt_ntp.h" 43 #endif 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/proc.h> 48 #include <sys/mount.h> 49 #include <sys/signal.h> 50 #include <sys/signalvar.h> 51 #include <sys/mman.h> 52 #include <sys/ktrace.h> 53 54 #include <sys/syscallargs.h> 55 56 #include <compat/freebsd/freebsd_syscallargs.h> 57 #include <compat/common/compat_util.h> 58 #include <compat/freebsd/freebsd_rtprio.h> 59 #include <compat/freebsd/freebsd_timex.h> 60 #include <compat/freebsd/freebsd_signal.h> 61 #include <compat/freebsd/freebsd_mman.h> 62 63 int 64 freebsd_sys_msync(struct lwp *l, const struct freebsd_sys_msync_args *uap, register_t *retval) 65 { 66 /* { 67 syscallarg(void *) addr; 68 syscallarg(size_t) len; 69 syscallarg(int) flags; 70 } */ 71 struct sys___msync13_args bma; 72 73 /* 74 * FreeBSD-2.0-RELEASE's msync(2) is compatible with NetBSD's. 75 * FreeBSD-2.0.5-RELEASE's msync(2) has addtional argument `flags', 76 * but syscall number is not changed. :-< 77 */ 78 SCARG(&bma, addr) = SCARG(uap, addr); 79 SCARG(&bma, len) = SCARG(uap, len); 80 SCARG(&bma, flags) = SCARG(uap, flags); 81 return sys___msync13(l, &bma, retval); 82 } 83 84 int 85 freebsd_sys_mmap(struct lwp *l, const struct freebsd_sys_mmap_args *uap, register_t *retval) 86 { 87 /* { 88 syscallarg(void *) addr; 89 syscallarg(size_t) len; 90 syscallarg(int) prot; 91 syscallarg(int) flags; 92 syscallarg(int) fd; 93 syscallarg(long) pad; 94 syscallarg(off_t) pos; 95 } */ 96 struct sys_mmap_args bma; 97 int flags, prot, fd; 98 off_t pos; 99 100 prot = SCARG(uap, prot); 101 flags = SCARG(uap, flags); 102 fd = SCARG(uap, fd); 103 pos = SCARG(uap, pos); 104 105 /* 106 * If using MAP_STACK on FreeBSD: 107 * 108 * + fd has to be -1 109 * + prot must have read and write 110 * + MAP_STACK implies MAP_ANON 111 * + MAP_STACK implies offset of 0 112 */ 113 if (flags & FREEBSD_MAP_STACK) { 114 if ((fd != -1) 115 ||((prot & (PROT_READ|PROT_WRITE))!=(PROT_READ|PROT_WRITE))) 116 return (EINVAL); 117 118 flags |= (MAP_ANON | MAP_FIXED); 119 flags &= ~FREEBSD_MAP_STACK; 120 121 pos = 0; 122 } 123 124 SCARG(&bma, addr) = SCARG(uap, addr); 125 SCARG(&bma, len) = SCARG(uap, len); 126 SCARG(&bma, prot) = prot; 127 SCARG(&bma, flags) = flags; 128 SCARG(&bma, fd) = fd; 129 SCARG(&bma, pos) = pos; 130 131 return sys_mmap(l, &bma, retval); 132 } 133 134 /* just a place holder */ 135 136 int 137 freebsd_sys_rtprio(struct lwp *l, const struct freebsd_sys_rtprio_args *uap, register_t *retval) 138 { 139 /* { 140 syscallarg(int) function; 141 syscallarg(pid_t) pid; 142 syscallarg(struct freebsd_rtprio *) rtp; 143 } */ 144 145 return ENOSYS; /* XXX */ 146 } 147 148 #ifdef NTP 149 int 150 freebsd_ntp_adjtime(struct lwp *l, const struct freebsd_ntp_adjtime_args *uap, register_t *retval) 151 { 152 /* { 153 syscallarg(struct freebsd_timex *) tp; 154 } */ 155 156 return ENOSYS; /* XXX */ 157 } 158 #endif 159 160 int 161 freebsd_sys_sigaction4(struct lwp *l, const struct freebsd_sys_sigaction4_args *uap, register_t *retval) 162 { 163 /* { 164 syscallarg(int) signum; 165 syscallarg(const struct freebsd_sigaction4 *) nsa; 166 syscallarg(struct freebsd_sigaction4 *) osa; 167 } */ 168 struct freebsd_sigaction4 nesa, oesa; 169 struct sigaction nbsa, obsa; 170 int error; 171 172 if (SCARG(uap, nsa)) { 173 error = copyin(SCARG(uap, nsa), &nesa, sizeof(nesa)); 174 if (error) 175 return (error); 176 nbsa.sa_handler = nesa.freebsd_sa_handler; 177 nbsa.sa_mask = nesa.freebsd_sa_mask; 178 nbsa.sa_flags = nesa.freebsd_sa_flags; 179 } 180 error = sigaction1(l, SCARG(uap, signum), 181 SCARG(uap, nsa) ? &nbsa : 0, SCARG(uap, osa) ? &obsa : 0, 182 NULL, 0); 183 if (error) 184 return (error); 185 if (SCARG(uap, osa)) { 186 memset(&oesa, 0, sizeof(oesa)); 187 oesa.freebsd_sa_handler = obsa.sa_handler; 188 oesa.freebsd_sa_mask = obsa.sa_mask; 189 oesa.freebsd_sa_flags = obsa.sa_flags; 190 error = copyout(&oesa, SCARG(uap, osa), sizeof(oesa)); 191 if (error) 192 return (error); 193 } 194 return (0); 195 } 196 197 int 198 freebsd_sys_utrace(struct lwp *l, const struct freebsd_sys_utrace_args *uap, register_t *retval) 199 { 200 /* { 201 syscallarg(void *) addr; 202 syscallarg(size_t) len; 203 } */ 204 205 return ktruser("FreeBSD utrace", SCARG(uap, addr), SCARG(uap, len), 206 0); 207 } 208
Indexes created Sat Sep 20 22:09:52 GMT 2025